Actual source code: ex97.c
1: static const char help[] = "Tests MatCreateSubMatrix with MatSubMatrix versus MatAIJ, non-square\n";
3: #include <petscmat.h>
5: static PetscErrorCode AssembleMatrix(MPI_Comm comm,Mat *A)
6: {
7: Mat B;
8: PetscInt i,ms,me;
10: MatCreate(comm,&B);
11: MatSetSizes(B,5,6,PETSC_DETERMINE,PETSC_DETERMINE);
12: MatSetFromOptions(B);
13: MatSetUp(B);
14: MatGetOwnershipRange(B,&ms,&me);
15: for (i=ms; i<me; i++) {
16: MatSetValue(B,i,i,1.0*i,INSERT_VALUES);
17: }
18: MatSetValue(B,me-1,me,me*me,INSERT_VALUES);
19: MatAssemblyBegin(B,MAT_FINAL_ASSEMBLY);
20: MatAssemblyEnd(B,MAT_FINAL_ASSEMBLY);
21: *A = B;
22: return 0;
23: }
25: static PetscErrorCode Compare2(Vec *X,const char *test)
26: {
27: PetscReal norm;
28: Vec Y;
29: PetscInt verbose = 0;
31: VecDuplicate(X[0],&Y);
32: VecCopy(X[0],Y);
33: VecAYPX(Y,-1.0,X[1]);
34: VecNorm(Y,NORM_INFINITY,&norm);
36: PetscOptionsGetInt(NULL,NULL,"-verbose",&verbose,NULL);
37: if (norm < PETSC_SQRT_MACHINE_EPSILON && verbose < 1) {
38: PetscPrintf(PETSC_COMM_WORLD,"%30s: norm difference < sqrt(eps_machine)\n",test);
39: } else {
40: PetscPrintf(PETSC_COMM_WORLD,"%30s: norm difference %g\n",test,(double)norm);
41: }
42: if (verbose > 1) {
43: VecView(X[0],PETSC_VIEWER_STDOUT_WORLD);
44: VecView(X[1],PETSC_VIEWER_STDOUT_WORLD);
45: VecView(Y,PETSC_VIEWER_STDOUT_WORLD);
46: }
47: VecDestroy(&Y);
48: return 0;
49: }
51: static PetscErrorCode CheckMatrices(Mat A,Mat B,Vec left,Vec right,Vec X,Vec Y,Vec X1,Vec Y1)
52: {
53: Vec *ltmp,*rtmp;
55: VecDuplicateVecs(right,2,&rtmp);
56: VecDuplicateVecs(left,2,<mp);
57: MatScale(A,PETSC_PI);
58: MatScale(B,PETSC_PI);
59: MatDiagonalScale(A,left,right);
60: MatDiagonalScale(B,left,right);
62: MatMult(A,X,ltmp[0]);
63: MatMult(B,X,ltmp[1]);
64: Compare2(ltmp,"MatMult");
66: MatMultTranspose(A,Y,rtmp[0]);
67: MatMultTranspose(B,Y,rtmp[1]);
68: Compare2(rtmp,"MatMultTranspose");
70: VecCopy(Y1,ltmp[0]);
71: VecCopy(Y1,ltmp[1]);
72: MatMultAdd(A,X,ltmp[0],ltmp[0]);
73: MatMultAdd(B,X,ltmp[1],ltmp[1]);
74: Compare2(ltmp,"MatMultAdd v2==v3");
76: MatMultAdd(A,X,Y1,ltmp[0]);
77: MatMultAdd(B,X,Y1,ltmp[1]);
78: Compare2(ltmp,"MatMultAdd v2!=v3");
80: VecCopy(X1,rtmp[0]);
81: VecCopy(X1,rtmp[1]);
82: MatMultTransposeAdd(A,Y,rtmp[0],rtmp[0]);
83: MatMultTransposeAdd(B,Y,rtmp[1],rtmp[1]);
84: Compare2(rtmp,"MatMultTransposeAdd v2==v3");
86: MatMultTransposeAdd(A,Y,X1,rtmp[0]);
87: MatMultTransposeAdd(B,Y,X1,rtmp[1]);
88: Compare2(rtmp,"MatMultTransposeAdd v2!=v3");
90: VecDestroyVecs(2,<mp);
91: VecDestroyVecs(2,&rtmp);
92: return 0;
93: }
95: int main(int argc, char *argv[])
96: {
97: Mat A,B,Asub,Bsub;
98: PetscInt ms,idxrow[3],idxcol[4];
99: Vec left,right,X,Y,X1,Y1;
100: IS isrow,iscol;
101: PetscBool random = PETSC_TRUE;
103: PetscInitialize(&argc,&argv,NULL,help);
104: AssembleMatrix(PETSC_COMM_WORLD,&A);
105: AssembleMatrix(PETSC_COMM_WORLD,&B);
106: MatSetOperation(B,MATOP_CREATE_SUBMATRIX,NULL);
107: MatSetOperation(B,MATOP_CREATE_SUBMATRICES,NULL);
108: MatGetOwnershipRange(A,&ms,NULL);
110: idxrow[0] = ms+1;
111: idxrow[1] = ms+2;
112: idxrow[2] = ms+4;
113: ISCreateGeneral(PETSC_COMM_WORLD,3,idxrow,PETSC_USE_POINTER,&isrow);
115: idxcol[0] = ms+1;
116: idxcol[1] = ms+2;
117: idxcol[2] = ms+4;
118: idxcol[3] = ms+5;
119: ISCreateGeneral(PETSC_COMM_WORLD,4,idxcol,PETSC_USE_POINTER,&iscol);
121: MatCreateSubMatrix(A,isrow,iscol,MAT_INITIAL_MATRIX,&Asub);
122: MatCreateSubMatrix(B,isrow,iscol,MAT_INITIAL_MATRIX,&Bsub);
124: MatCreateVecs(Asub,&right,&left);
125: VecDuplicate(right,&X);
126: VecDuplicate(right,&X1);
127: VecDuplicate(left,&Y);
128: VecDuplicate(left,&Y1);
130: PetscOptionsGetBool(NULL,NULL,"-random",&random,NULL);
131: if (random) {
132: VecSetRandom(right,NULL);
133: VecSetRandom(left,NULL);
134: VecSetRandom(X,NULL);
135: VecSetRandom(Y,NULL);
136: VecSetRandom(X1,NULL);
137: VecSetRandom(Y1,NULL);
138: } else {
139: VecSet(right,1.0);
140: VecSet(left,2.0);
141: VecSet(X,3.0);
142: VecSet(Y,4.0);
143: VecSet(X1,3.0);
144: VecSet(Y1,4.0);
145: }
146: CheckMatrices(Asub,Bsub,left,right,X,Y,X1,Y1);
147: ISDestroy(&isrow);
148: ISDestroy(&iscol);
149: MatDestroy(&A);
150: MatDestroy(&B);
151: MatDestroy(&Asub);
152: MatDestroy(&Bsub);
153: VecDestroy(&left);
154: VecDestroy(&right);
155: VecDestroy(&X);
156: VecDestroy(&Y);
157: VecDestroy(&X1);
158: VecDestroy(&Y1);
159: PetscFinalize();
160: return 0;
161: }
163: /*TEST
165: test:
166: nsize: 3
168: TEST*/